Richard Mille ‘Bubba Watson’ RM 055

by D Constant on April 9, 2012

in Exclusive Watch Reviews, Latest Reviews, Product Information, Richard Mille, Sports Watch Reviews

Richard Mille RM 055 ‘Bubba Watson’


Written By: D Constant for The Watch Review Site

Richard Mille is introducing us all to the new Bubba Watson timepiece or the Richard Mille RM 055 ‘Bubba Watson’

As a further step forward from the RM 038 Bubba Watson, Richard Mille have created the RM055 Bubba Watson, The new RM 055 is inspired by the RM 038 launched a mere 14 months ago, The RM 055 sports a mechanical movement in grade 5 titanium displays extreme skeletonization, with a PVD- and Titalyt® treated base plate and bridges.

Richard Mille RM 055 Bubba Watson

The movement in the RM 055 is a RMUL2 Caliber as opposed to the RM038 Caliber used in the Initial Richard Mille Bubba Watson Timepiece. TheRMUL2 is equipped with a variable-inertia balance wheel, which ensures reliability in the event of impacts and during assembly and dismantling, thus improving the long-term accuracy of the timepiece. The regulator index is eliminated, and a more accurate and repeatable inertia adjustment is possible thanks to four small adjustable weights located directly on the balance wheel.

The double barrel mechanism helps to improve and equalize long-term torque stability: This is achieved by dispersing the stored energy within two winding barrels, equalizing torque as well as reducing pressure and friction on the bearings and pivots, resulting in improved long-term performance.

The caliber RMUL2 is thus capable of withstanding accelerations of over 500-G’s (cant really see anyone being able to test that to confirm can you) so lets take Richard Mille’s word on it hey.

As with the RM 038, the new RM 055 Bubba Watson is assembled using several sizes of spline screws in both the case and the movement. We have seen an increase in the total number of screws used from 12 to 20, with the RM 055 having 12 on the front face and 8 on the rear in comparison to the 8 on the front of the RM 038 Bubba Watson and 4 on the back, These screws age very well and provide better control of the torque applied during assembly, and are unaffected by the physical manipulations involved in assembly and dis assembly, so in turn providing better rigidity also.

Richard Mille has opted to use an ATZ bezel so it can meet the demands of sportsmen who this watch is obviously aimed at. The ATZ bezel is made from tubes of aluminium oxide powder injected at a pressure of nearly 2,000 bars. This high-pressure injection increases rigidity by up to 30% and reduces the material’s porosity to an absolute minimum. ATZ is known for its high scratch resistance (1,400 Vickers) and its unchangeable colour. Next to diamonds, ATZ is one of the hardest materials known to man. This being the case its an arduous and strenuous task using diamond tools to machine a perfect example of the Richard Mille bezel, which is finished in a satin manner.

Again this watch is white well whitish with a with a White Rubber injected band, to match the previous incarnation of the Richard Mille Bubba Watson.

Richard Mille RM 055 Bubba Watson Back

We feel that the RM 055 Bubba Watson will make a worthy successor to the RM 038 Bubba Watson, But will Bubba himself agree especially after winning the 2012 US Masters donning an RM 038.

The Richard Mille RM 055 Bubba Watson is a highly technical creation that is innovative, sporting and hand-finished in the finest watchmaking traditions as expected. It is to be released in a Limited Edition of how many we don’t yet know but i have emailed my press contact at Richard Mille enquiring….. Watch this space but expect it to be low numbers and priced similarly to the RM 038

Technical Details – Richard Mille RM 055 Bubba Watson

Case: available in rubberized grade-5 titanium case band and back with ATZ front bezel.
Dimensions : 49.90 mm x 42.70 mm x 13.05 mm.

Caliber:  RMUL2, a manual winding skeleton movement with hours, minutes and seconds

Movement weight: 4.3 grams, Movement dimensions: 30.25 x 28.45 mm, Thickness: 3.15 mm

Barrel arbour in 20AP steel
Balance wheel: GLUCYDUR, 4 arms, moment of inertia 4.8 mg.cm2, angle of lift 53°
Frequency: 28,000 vibrations per hour (4 Hz)
Balance spring: Elinvar

Shock protection: Incabloc 908.22.211.100 (transparent)

Power Reserve: Circa 55 hours.

Number of jewels: 24

Case:  ATZ for the bezel of the RM 055 BUBBA WATSON case, with a rubberized grade-5 titanium caseband and back, the case middle and back are in grade 5 titanium with a protective white rubber casing.

Water resistant to 30 metres.

Crown: In grade 5 titanium with collar in Alcryn.

Flange in black carbon fiber with index points filled with an approved luminescent material, Minute flange in DLC-coated titanium.


Bezel side: in sapphire (1,800 Vickers) with anti-glare coating (on both sides). Thickness: 1.50 mm
Case back: in sapphire (1,800 Vickers) with anti-glare coating (on both sides). Thickness: 1.20 mm and 2.04 mm at the outer edges


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